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Announcement > SAP10387
DIR-3040:: H/W Rev. Ax:: F/W v120B03 Beta Hotfix ::ZDI-CAN-21668 : prog.cgi websSecurityHandler Memory Leak Denial-of-Service
Publication ID: SAP10387
Resolved Status:
Published on: 14 May 2024 9:01 GMT
Last updated on: 14 May 2024 9:05 GMT




Starting on August 16, 2023, 3rd party security research from TrendMicro ZDI reported a series of reports for the DIR-3040 hardware rev. Ax, firmware 120B03 Beta Hotfix and below have multiple security vulnerabilities


As soon as D-Link was made aware of the reported security issues, we promptly started our investigation and began developing security patches.

D-Link takes network security and user privacy very seriously. We have a dedicated task force and product management team on call to address evolving security issues and implement appropriate security measures.


Report Information  


         - Reported by TrendMicro ZDI

                       ZDI-CAN-21668 :: D-Link DIR-3040 prog.cgi websSecurityHandler Memory Leak Denial-of-Service Vulnerability


Affected Models



Hardware Revision


Affected FW

Fixed FW


 Last Updated


All A Series Hardware Revisions


v120B03 Beta  & below

v120B03a Beta Hot-Fix


Download and Update



Regarding the Security patch for your D-Link Devices


Firmware updates address the security vulnerabilities in affected D-Link devices. D-Link will continually update this, and we strongly recommend that all users install the relevant updates.


Just so you know, this is a device beta software, beta firmware, or hot-fix release that is still undergoing final testing before its official release. The beta software, beta firmware, or hotfix is provided on an “as is” and “as available” basis, and the user assumes all risk and liability for use. D-Link does not give any express or implied warranties regarding the suitability or usability of the beta firmware. D-Link will not be liable for any direct, indirect, special, or consequential loss suffered by any party because of their use of the beta firmware.


As our products have different hardware revisions, please check this on your device before downloading the correct corresponding firmware update. The hardware revision information can usually be found on the product label on the underside of the product next to the serial number. Alternatively, it can also be found on the device's web configuration.